Thrashing-machine



(No Model.)

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UNITED STATES PATENT OFFICE.

JOEL BENNITT, OF PALO, MICHIGAN.

" THRASHlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 261,126, dated July 18, 1882,

Application filed June 6, 1881.

To all whom it may concern:

Be it known that I, JOEL BENNITT, of Palo, county of Ionia, State of Michigan, have invented a new and useful Improvement in Threshing-Machines; and I declare the following to be afull, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form a part of this specification.

"My invention consists of the combinations of devices and appliances hereinafter described, and more fully pointed out in the claim.

The drawing represents a longitudinal vertical section, illustrating the essential features of my invention.

This invention relates to thrashing-machines of the class in which rotary rakes are employed to move the straw from the machine; and it consists in a novel combination of devices for accelerating the speed of the successive rakes in a series of rotary rakes arranged to carry the straw from the thrashing-cylinder, as will be hereinafter particularly described.

Ais the frame-work of a thrashing-machine, B its thrashing-cylinder, and B its concave; B a guide-board which directs the pro-' ducts of the cylinder out upon the separating devices.

The separating devices consist of a series of shafts, O 0 0 &c., hearing at suitable intervals iron teeth or fingers'c. At the side of the machine, and either upon the inside or the outside, are pulley-wheels E E E, &c.,

.which mesh preferably by frictional contact with a series of idle pulleys, D D D", 850., so that the whole series may be operated by power applied to any pulley, but preferably at the pulley D. I prefer that this pulley be geared by belt F and cone-pulleys G G with (No model.)

and chaff that is dropped upon it forward to thesievc-frame and delivers it upon the sieves.

I represents the sieve-frame, with its sieves I. This is provided with any ordinary means (not shown) for imparting to the sieves a lateral vibration, and also longitudinal, if desired, though the blast of the fan will usually be sufficient for feedingthe chafi off the sieves.

J is the fan.

K is the tailings-spout, provided with any suitable means (not shown) for directing its contents into an elevator, L, which elevatesit back in front of the thrashing-cylinder to be passed again over the sieves.

M is the seed-box or spout for collecting the seed or delivering it-out at the side of the machine.

The operation of the machine proper is as follows Grain fed to the thrashing-cylinder is thrashed andthrown rearwardjustwithin reach of the teeth or fingers c of the shaft (3. These fingers catch the straw, loosen it up, and pass it over to the next shaft, which, moving a little faster, grasps it and throws it to the next, and so on, and as it moves from shaft to shaft it is hurried faster and faster and becomes therefore thinner and thinner... In this pro cess the grain is quickly separated and falls below upon the raddle-belt H, which conveys it and the chafi upon the sieves, where it is subjected to the action of the fan in the usual operation.

A wing-board, J, may serve to give proper direction to the blast from the fan.

A machine made upon this plan is light running, is quite noiseless, is not liable to clog up, and will run with little or no jarring. Moreover the separation is more nearly perfect than with any system of bolts with which I am acquainted.

The portion A of the frame I preferably enlarge, so as to give a free and unimpeded course to the straw and chaff as it emerges from the thrashing-cylinder.

0 represents idle pulleys, whose sole function is to receive the thrust from the intermediate pulleys, and thus holdthem all to their work.

I am aware that rakes and aprons in series in thrashing-machines have been accelerated the rake-shaft pulleys, and means for commusuccessively 5 and I do not claim such construenieating rotary motion to one of said drivingtion broadly. pulleys, substantially as described.

What I claim is- In testimonywhereoflsign this specification 5 The combination, with the thrashing-cylinin the presence of two witnesses.

der, of the series of rake-shafts the series of 1 T pulleys mounted thereon and decreasing in JOILL BEBNITT' diameter successively from said cylinder, and Witnesses: the series of driving-pulleys increasing in di- HENRY MILLERy: IO anieter in the same order and engaging with RICHARD MILLER. 

